Metal-turning tool.



N0. 667,3". Patented Feb. 5, |90L E. C. HENN.

METAL TURNING TOOL.

(Application filed Oct. -19, 1900.1

(No Model.)

Izzve ntor:

Bow/'22 6.1952222.

UNITED. STATES ATENT FFIJCE.

EDWIN C. HENN, OF BLOOMFIELD, CONNECTICUT.

METAL-TURNING TOOL.

SPECIFICATION forming part of Letters Patent No. 667,31 1, datedFebruary 5, 1901.

Application filed October 19, 1900. Serial No. 33,596. (No model.)

To all whom it may concern.-

Be it known that I, EDWIN C. HENN, a citizen of the United States,residing in Bloomfield, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inMetal-Tu rning Tools, of which the following is a specification.

This invention relates to metal-working tools, and more particularly tothat class of those devices known as sizing-tools and which are employedfor reducing a rod or bar and for simultaneously turning it to thedesired configuration.

Primarily the object of the invention is the provision of a tool of suchconstruction that when the tool advances the angle of the cutting-facethereof with relation to the work will automatically change from aposition to form a relatively deep out at the inception of the operationto a position for forming a shaving out toward and at the end of saidoperation.

A further object of the invention is the provision of a metal-cuttingtool having a guide movable with said tool, said guide acting againstthe work and governing the angular position of the working face of thetool with relation to said work, whereby the tool will cut deeper intothe stock at the inception of its cutting stroke and will finish itswork with a light or shaving out.

A further object of the invention is the provision in connection with ametal-cutting tool of a guide which will engage the work in advance ofthe cutting-tool and will regulate the position of the cutting-face ofsaid tool with relation to the work in such a way that a relatively deepcut will be taken by the tool at the inception of its stroke and a lightor shaving out at the end of said stroke.

A further object of the invention is the provision in connection with acutting-tool and guide of a holder by which said parts are carried, saidholder being mounted for movement in a direction transverse to the pathof the cutting-stroke of the tool, in virtue of which the work regulatesthe position of the tool, and the latter is enabled to follow the workshould it, as is frequently the case, be out of a true position duringthe cutting operation.

In the accompanying drawings, Figure l is a front elevation of myimproved tool, showing it in place on the tool-head of a machine frame,the work being represented in front of said head and the spindlescarrying the work being illustrated by dotted lines. Fig. 2 isasideelevation of myimproved tool. Fig. 3 is an end View of the tool. Fig. 4.is a longitudinal vertical section of the tool, a part of the shankthereof being shown in elevation. Fig. 5 is a diagram showing by fulland dotted lines the manner in which the tool operates upon the work.Fig. 6 is an end view of the tool at the commencement of 'theoperation-4. e., the position represented by full lines in Fig. 5; andFig. 7 is a like view at the termination of the cutting operation,correspondingto the position represented by dotted lines in Fig. 5.

Similar characters designate like parts throughout the several views.

Referring to the drawings, the numeral 5 designates the tool-head of amachine, which may be of the kind set forth in United States Patent No.530,180, granted R. Hakewessel December 4, 1894:, in which are bosses 6,the work being marked 7. The work may be carried by spindles 60,(represented by dotted lines in Fig. 1,) mounted for rotation in arevoluble head, which is intermittingly turned to bring the rods or barscarried in the spindles into contact with the sizing or reducing tool.

Arranged, as shown, in vertical guideways 8 of the head 5 is a slide 9,havinga suitable fastening device 10, by which the shank of the improvedreducing and forming tool is secured in position, and connected withthis slide is a pitman 12 or other suitable device, which in practicewill be operated by a cam or its equivalent onashaft of the machine tocause the tool to be advanced toward and from the work at certainintervals.

Designated by the numeral 13 is my improved sizing and reducing tool,which in the exemplification given is composed of a shank 14, secured tothe slide 9 by the fastening device 10, or it may be mounted in otherWays, and this shank is provided at one end with a hollow head 14 andlongitudinally of its body with a chamber 15, in which is placed acoiled2 sass or other suitable spring 16 and a plug orbolt 17, having achamfered head 17', said bolt being normally pressed outward bysaidsprin Threaded into a wall of the head 14: is an adjustable screw 18,which is locked after adjustment by a jam -nut l9, and pivotally mountedupon a bolt 20 of said head is a stock 21, havingin inclined wall 21', aslotted extension 21 a guideway 21 and an angularly-disposed projectionor seat 21 the stock being approximately of L shape in cross-section.Fitted upon the inner face of the slotted extension 21 is an L-shapedblock provided with a series of openings 22, having threaded walls, andpassing through the slot of the extension 21 is a bolt 23, having anexterior thread adapted to be engaged with the threaded walls of any ofsaid openings. A screw 24: passes through the end of the stock 21, itsinner end bearing against the bolt 23, and on loosening said bolt andturning the screw the block 22, which carries the turning-tool,'may beadjusted as desired in the guideway 21 and after this adjustment hasbeen accomplished the bolt is tightened securely to lock said block inposition.

Secured by a screw 25, or it may be in any other suitable way, to thearm of the L- shaped block 22 is a metal-turning tool '26, having acutting-face of any desired form, and fitted on the seat 21 on the stock21 is a guide 27, projecting slightly beyond the tool 26 andsubstantially conforming in shape to that of the tool, said guide beingsecured in place by a screw or other suitable device 28, passing looselythrough the seat and threaded into the guide. The shank i l, with itschambered head, serves as a carrier for the turning-tool and guide.

While the slide9 is illustrated in a vertical position, it is distinctlyto be understood that the invention is not limited in this respect, forit may be arranged in horizontal or other positions, if desired.

In the operation of my invention when the head in which thework-carrying spindles are mounted is rotated to bring one of saidspindles in line with the sizing and reducing tool the slide 9, carryingsaid tool, is reciprocated,and the guide 27 will by contact with thework cause the stock 21 to swing on its pivot 20 against the pressure ofthe spring-actuated plug 17, thereby throwing the turning edge of thecutting-tool 26 to a position substantially as represented by full linesin Fig. 5. In this position of said tool as it enters the rotating worka relatively deep or rank cut will at first be made, and as theturning-tooladvances the angle of the turning face thereof with relationto the work will decrease from the position where a comparatively deepor rank cut is made at the start to a position where a light or shavingcut will be made at the finish, as represented, by dotted lines in Fig.5. derstood by reference to Figs. 5 and 6, by which it will be seen thatthe stock carrying This operation will be readily unthe turning-tool andthe guide moves transversely of the work as'the tool advances thereon.In other words, when the guide 27 first comes into contact with the workthe stock is swung upon its pivot 20 to cause the tool 26 to enter thework at the angle represented by full lines in Fig. 5, and as the tooladvances and the work is constantly rotated it will be seen that afterthe rank cut is made at the inception of its cutting stroke the guide27, being in contact with the work, will follow and enter said cut, andthereby permit the stock 21 to be swung on its pivot by thespring-actuated plunger 17 to throw the tool 26 to the positionrepresented by dotted lines in said Fig. 5, where the light or finishingcut is made. To enable this action of the stock to be readilyaccomplished, the rear wall of said stock is inclined at 21 to fit thechamfered end of the spring-actuated plug 17.

To limit as desired the oscillation of the stock upon its pivot 20, thescrew 18 is provided, and the inner end of said screw bears against aportion of the stock at one side of said pivot.

To accommodate the tool to various diameters of-work, the block 22 ismade adjustable in the manner above described, and by withdrawing thebolt 23 from one of its threaded seats22 in said block and inserting itin another of said seats a wide range of adj ustment may be obtained.

A further advantage of the pivoted stock illustrated resides in the factthat the tool is enabled to conform to the work and to accurate turning,even if said work should be slightly out of its true position, for, asis obvious, when the guide 27 comes into contact with said work thestock will yield, and thus enable the work to be properly receivedbetween the guide and cutter.

Any suitable configuration may be given to the working face of thecutting-tool and to that of the guide, my invention not being limited inthis respect.

By combining the cutting-tool with the guide, both tool and guide beinglocated in the direction of the feed-stroke or of the advancing movementof the tool to the work, and so mountingsaid combined tooland guide thatthey are adapted for movement transversely of the advancing movement orstroke of thetool it will be seen that the work regulates the positionof the cutting-tool and that the tool will always follow the work shouldit, as is sometimes the case, run somewhat out of true during thefinishing cut. This peculiar coaction of the work with the tool andguide results in producing a high-class prodnot and in materiallyreducing the difficulty and cost of manufacturing said product.

It will be seen that one part of the surface of the work (and only onepart at a time) serves as a stop-face for controlling the out being.made on another part of the same general surface, whereby, as abovestated, the turning-tool will first be caused to operate upon the workwith a deep or rank cut and will then be caused to finish the work witha light' 'or shaving cut.

Many changes may be made in the details of the devices illustratedwithout departure from my invention, and the invention is not limited tothe precise construction shown, but includes within its purviewmodifications capable of accomplishing the same result, al thoughoperating in a slightly different manner. Furthermore, my invention isnot limited in use, for it may be applied to ordinary turning-lathes orto multiple-spindle lathes of other kinds than those set forth in thepatent above mentioned.

Having thus described my invent-ion, I claim 1. The combination, withmeans for supporting the work, of a tool for turning said work, andmeans for causing said tool to operate upon the work at the inception ofits stroke with a relatively deep cut and at the finish of said strokewith a light or shaving out over the same surface.

2. The combination, with means for supporting and rotating the work, ofa turningtool; a guide cooperating with said turningtool; and means forso mounting said guide and tool that they will move togethertransversely of the path of the cutting-stroke of said tool during saidstroke, whereby said tool will operate upon the work first With arelatively deep cut and then with a light or shaving cut.

3. The combination, with means for supporting and rotating the work, ofa movablymounted stock; a turning-tool carried by said stock; a guidealso carried by the stock and cooperating with the turning-tool; andmeans for advancing the guide and tool together toward and from thework, whereby said tool will operate upon the work first with arelatively deep cut and then with a light or sh aving cut.

at. The combination, with a rotating spindle, of a slide movable towardand from said spindle; a turning-tool and a guide carried by said slide;and a pivoted stock in which said turning-tool and guide are mounted,movable transversely of the spindle.

5. A metal-Working tool comprising a carrier adapted for movement towardand from the work; a stock pivoted in said carrier; at turning-tooladjustably mounted in said stock; and a guide carried by the stock andlocated opposite said turning-tool.

6. A metal-working tool comprising a carrier; a stock pivoted in saidcarrier; a springactuated plug bearing against the rear wall of saidstock; a turning tool adj ustably mounted in the stock; and a guidehaving its end projecting beyond said turning-tool and located oppositeto said tool.

7 A metal-working tool comprising a carrier; a stock pivoted in saidcarrier and having a slotted extension; means for permitting said stockto yield upon its pivot; a block adjustably mounted in the stock; aturning-tool secured to the block; and a guide having its end projectingbeyond said turning-tool and also carried by the stock.

8. A metal-working tool comprisinga shank having a chambered head; astock pivoted in said head and having a slotted extension; a block;means passing through the slot of the extension and serving adjustablyto secure said block thereto; a turning-tool mounted on the block; and aguide carried by the stock and located opposite the turning-tool.

9. A metal-working tool comprising a carrier having a shank and achambered head; a stock pivoted in said head; a spring-actuated plugagainst which said stock bears; a block adjustably mounted on the stockand carrying a turning-tool; and a guide carried by the stock andcooperating with said turning-tool.

10. A metal working tool comprising a shank having a longitudinalchamber; a spring-actuated plug seated in said chamber; a stock pivotedto the head of said shank and bearing against said plug; a turning-toolcarried by said stock; and a guide also carried by the stock and locatedopposite said turning-t-ool.

11. A metal-working tool comprising a carrier; a turning-tool pivotedtherein; and a guide having its end projecting beyond the turning-tooland movable therewith, the construction being such that the tool willfirst operate upon the work with a relatively deep cut and then operateupon said work with a light or shaving cut.

12. A metal working tool comprising a shank having a chambered head; astock pivoted in said head and having a seat; a guide secured to saidseat; a block adjustable in the ways of the stock; and a turning-toolcarried by said block.

13. A metal working tool comprising a shank and a chambered head; astock pivotally mounted in said head; yielding means for normallypressing the stock outward upon its pivot; a block adjustable in Ways ofthe stock and carrying a turning tool; and a guide located opposite saidturning-tool and also carried by the stock.

ED WIN 0. HENN.

Witnesses:

ROBBINS BATTELL SToEcKEL, HERBERT KNOX SMITH.

